面向制造的特征设计和工序图形的自动生成

提出了特征节点和工艺间模型的概念,对模型特征树进行分析,实现特征节点到工艺间模型的映射,利用特征回退技术直接得到部分工序的工序图形.归纳了特征设计中面向制造的设计约束,扩充和细化模型特征树,使其包括可以映射到相应的工艺间模型所必须的特征节点,可生成所有的工序图形.该方法适用于所有类型的零件和装配体.在Pro/E上二次开发了工序图自动生成系统,并用该系统生成了某非轴类零件和某子装配的工序图形.

Feature Design Based on Design for Manufacturing and Automatic Generation of Process Drawings

Definitions of feature node and in-process model are put forward. With these concepts analysis of model feature tree can be performed and mapping of feature nodes to in-process models can be realized. Based on these, some process drawings can be obtained through feature roll-back. On this basis, some constraints in design for manufacturing are brought forward. Under these constraints, features in the model tree can be refined so that there are enough feature nodes to ensure mappings from the feature nodes to in-process models and then all the process drawings can be generated. This process can be used to generate drawings of all kinds for parts and assemblies and not just the axial parts. As a way of realization, the automatic generation system is thus developed based on Pro/E. Relevant drawings for a non-axial part and a sub-assembly are generated.